/*
 * Copyright 2024-2025 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.cloud.ai.graph.agent.flow.node;

import java.util.concurrent.CompletableFuture;

import com.alibaba.cloud.ai.graph.OverAllState;
import com.alibaba.cloud.ai.graph.action.AsyncEdgeAction;

/**
 * An async edge action that evaluates conditions to determine routing paths. This class
 * reads the condition result from the state and returns the appropriate route.
 */
public class ConditionEvaluatorAction implements AsyncEdgeAction {

	private static final String CONDITION_KEY = "_condition_result";

	@Override
	public CompletableFuture<String> apply(OverAllState state) {
		CompletableFuture<String> result = new CompletableFuture<>();

		try {
			// Get the condition result from the state
			String conditionResult = state.value(CONDITION_KEY, "default");
			result.complete(conditionResult);
		}
		catch (Exception e) {
			result.completeExceptionally(e);
		}

		return result;
	}

}
